using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace Soyuz5.Utility
{
    public class Guid
    {

        //http://geekswithblogs.net/colinbo/archive/2006/01/18/66307.aspx

        /// <summary>
        /// Converts the string representation of a Guid to its Guid 
        /// equivalent. A return value indicates whether the operation 
        /// succeeded. 
        /// </summary>
        /// <param name="s">A string containing a Guid to convert.</param>
        /// <param name="result">
        /// When this method returns, contains the Guid value equivalent to 
        /// the Guid contained in <paramref name="s"/>, if the conversion 
        /// succeeded, or <see cref="Guid.Empty"/> if the conversion failed. 
        /// The conversion fails if the <paramref name="s"/> parameter is a 
        /// <see langword="null" /> reference (<see langword="Nothing" /> in 
        /// Visual Basic), or is not of the correct format. 
        /// </param>
        /// <value>
        /// <see langword="true" /> if <paramref name="s"/> was converted 
        /// successfully; otherwise, <see langword="false" />.
        /// </value>
        /// <exception cref="ArgumentNullException">
        ///        Thrown if <pararef name="s"/> is <see langword="null"/>.
        /// </exception>
        public static bool TryParse(string s, out System.Guid result)
        {
            result = System.Guid.Empty;

            if (s == null)
                return false;

            Regex format = new Regex(
                "^[A-Fa-f0-9]{32}$|" +
                "^({|\\()?[A-Fa-f0-9]{8}-([A-Fa-f0-9]{4}-){3}[A-Fa-f0-9]{12}(}|\\))?$|" +
                "^({)?[0xA-Fa-f0-9]{3,10}(, {0,1}[0xA-Fa-f0-9]{3,6}){2}, {0,1}({)([0xA-Fa-f0-9]{3,4}, {0,1}){7}[0xA-Fa-f0-9]{3,4}(}})$");
            Match match = format.Match(s);
            if (match.Success)
            {
                result = new System.Guid(s);
                return true;
            }
            return false;
        }
    }
}
